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xen: arm: consolidate barrier definitions
These are effectively identical on both 32- and 64-bit. The only difference is that they implicit "sy" on 32-bit becomes explicit. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Tim Deegan <tim@xen.org> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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@@ -2,22 +2,6 @@
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#ifndef __ASM_ARM32_SYSTEM_H
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#define __ASM_ARM32_SYSTEM_H
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#define sev() __asm__ __volatile__ ("sev" : : : "memory")
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#define wfe() __asm__ __volatile__ ("wfe" : : : "memory")
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#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
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#define isb() __asm__ __volatile__ ("isb" : : : "memory")
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#define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
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#define dmb() __asm__ __volatile__ ("dmb" : : : "memory")
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#define mb() dsb()
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#define rmb() dsb()
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#define wmb() mb()
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#define smp_mb() mb()
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#define smp_rmb() rmb()
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#define smp_wmb() wmb()
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extern void __bad_xchg(volatile void *, int);
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static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
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@@ -2,23 +2,6 @@
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#ifndef __ASM_ARM64_SYSTEM_H
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#define __ASM_ARM64_SYSTEM_H
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#define sev() asm volatile("sev" : : : "memory")
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#define wfe() asm volatile("wfe" : : : "memory")
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#define wfi() asm volatile("wfi" : : : "memory")
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#define isb() asm volatile("isb" : : : "memory")
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#define dsb() asm volatile("dsb sy" : : : "memory")
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#define dmb() asm volatile("dmb sy" : : : "memory")
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#define mb() dsb()
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#define rmb() dsb()
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#define wmb() mb()
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#define smp_mb() mb()
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#define smp_rmb() rmb()
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#define smp_wmb() wmb()
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extern void __bad_xchg(volatile void *, int);
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static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
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@@ -8,6 +8,22 @@
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#define nop() \
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asm volatile ( "nop" )
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#define sev() asm volatile("sev" : : : "memory")
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#define wfe() asm volatile("wfe" : : : "memory")
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#define wfi() asm volatile("wfi" : : : "memory")
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#define isb() asm volatile("isb" : : : "memory")
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#define dsb() asm volatile("dsb sy" : : : "memory")
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#define dmb() asm volatile("dmb sy" : : : "memory")
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#define mb() dsb()
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#define rmb() dsb()
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#define wmb() mb()
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#define smp_mb() mb()
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#define smp_rmb() rmb()
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#define smp_wmb() wmb()
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#define xchg(ptr,x) \
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((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
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